SOHC.co.uk Forums > CB350/400

Coil sizes...universal or not?

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gtmdriver:
No matter where you buy your coils check that they have the correct primary coil resistance. For contact breaker ignition the resistance should be at least 3 ohms. Any less and you risk arcing of the points with rapid contact breaker wear and condenser damage.

Bryanj:
I think 5 ohm is needed for the 500/550 and smaller fours due to lower generator output

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